CN116075422A

CN116075422A - Laminated glass

Info

Publication number: CN116075422A
Application number: CN202180054551.4A
Authority: CN
Inventors: 千叶和喜
Original assignee: Nippon Sheet Glass Co Ltd
Current assignee: Nippon Sheet Glass Co Ltd
Priority date: 2020-09-04
Filing date: 2021-09-03
Publication date: 2023-05-05
Also published as: US20240025239A1; WO2022050388A1; EP4209344A1; JP2022043382A

Abstract

The invention provides laminated glass for an automobile, which can prevent appearance from being deteriorated due to wrinkles generated in a functional layer of an intermediate film arranged between 2 bent glass plates. The laminated glass of the present invention comprises: an outer glass plate; an inner glass plate disposed opposite to the outer glass plate; and an intermediate film disposed between the outer glass plate and the inner glass plate, the outer glass plate and the inner glass plate being bent in a horizontal direction and an up-down direction, the intermediate film including a functional layer and an adhesive layer for fixing the functional layer between the two glass plates, at least 1 notch or slit extending from an end edge thereof being formed in the functional layer.

Description

Laminated glass

Technical Field

The present invention relates to laminated glass for automobiles and the like.

Background

An automotive laminated glass used for windshields and the like is composed of an outer glass plate, an inner glass plate, and an interlayer film disposed between these glass plates. In recent years, various functions have been added to an interlayer film, and a functional layer such as a heat insulating film is disposed in the interlayer film in order to suppress a temperature rise due to light from outside the vehicle (for example, patent document 1).

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication 2016-64965

Disclosure of Invention

Problems to be solved by the invention

However, the laminated glass as described above is formed into a shape that is curved so as to protrude toward the vehicle outside. To explain in more detail, for example, many windshields have a three-dimensional structure that is curved along an axis extending in the horizontal direction, and also curved along an axis extending in the up-down direction. Therefore, if a functional layer as a flat film is sandwiched between two glass plates, there is a problem that the functional layer is wrinkled and the appearance is deteriorated.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide laminated glass for an automobile, which can prevent deterioration in appearance due to wrinkles generated in a functional layer of an interlayer film disposed between 2 glass plates that are bent.

Means for solving the problems

Item 1. A laminated glass capable of mounting an information acquisition device that acquires information outside a vehicle with light via a bracket, the laminated glass comprising:

an outer glass plate;

an inner glass plate disposed opposite to the outer glass plate;

a functional layer disposed between the outer glass plate and the inner glass plate;

an adhesive layer for fixing the functional layer between the two glass plates; and

a shielding layer provided on at least one of the outer glass plate and the inner glass plate, for suppressing transmission of visible light from outside the vehicle,

the outer glass plate and the inner glass plate are bent in a horizontal direction and an up-down direction,

the shielding layer includes:

a peripheral edge region formed at a peripheral edge portion of the laminated glass fixed to a vehicle body; and

a mounting area protruding from the peripheral area, capable of mounting at least a portion of the bracket,

when a pair of virtual lines extending perpendicularly from both ends of a connecting portion of the mounting region to the peripheral region with respect to an end edge of the laminated glass are defined, at least 1 notch or slit is formed at the end edge of the functional layer at a position corresponding to either one of a region sandwiched by the pair of virtual lines in the peripheral region and the mounting region.

The laminated glass according to item 1, wherein at least 1 notch is formed in the functional layer.

The laminated glass according to item 2, wherein the front end portion of the notch is formed by an acute angle corner.

The laminated glass according to any one of items 1 to 3, wherein the outer glass plate and the inner glass plate are formed into a rectangular shape having long sides and short sides,

the notch or slit is formed in the long side.

The laminated glass according to any one of items 1 to 4, wherein the outer glass sheet and the inner glass sheet have different radii of curvature in the horizontal direction and in the up-down direction,

the notch or slit is formed at an end edge in a direction along which the radius of curvature is small.

The laminated glass according to any one of items 1 to 5, wherein an information acquisition region for receiving the light is provided in the mounting region,

the notch or slit is not formed in the information acquisition region.

the notch is formed in such a manner as to include the information acquisition area.

The laminated glass according to any one of items 1 to 7, wherein the functional layer has at least 12 nd notch having an acute front end at a position different from the notch or slit at an end edge where the notch or slit is formed.

The laminated glass according to any one of items 1 to 8, wherein a plurality of the notches or slits are formed.

The laminated glass according to any one of items 1 to 9, wherein the notch or slit is further formed at a position corresponding to a peripheral edge region of the shielding layer.

The laminated glass according to any one of items 1 to 10, wherein the functional layer has a thickness of 2.0mm or less.

The laminated glass according to any one of items 1 to 11, wherein the functional layer is formed of a projection film for HUD.

The laminated glass according to any one of items 1 to 12, wherein the interlayer film includes the functional layer and a pair of the adhesive layers sandwiching the functional layer.

Effects of the invention

According to the present invention, it is possible to prevent deterioration in appearance due to wrinkles generated in the functional layer of the interlayer film disposed between the bent 2 glass plates.

Drawings

Fig. 1 is a plan view showing an embodiment of applying the laminated glass for an automobile of the present invention to a windshield.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is a partial cross-sectional view of the windshield of fig. 1.

Fig. 4 is an exploded cross-sectional view of a portion of the windshield of fig. 1.

Fig. 5 is a block diagram showing an example of an image processing apparatus.

Fig. 6 is a plan view of the windshield of fig. 1.

Fig. 7A is a diagram showing an example of the notch.

Fig. 7B is a diagram showing an example of the notch.

Fig. 7C is a diagram showing an example of the notch.

Fig. 7D is a diagram showing an example of the notch.

Fig. 8 is a diagram showing an example of the notch.

Fig. 9 is a view showing another example of the notch.

Fig. 10 is a plan view showing a windshield of an embodiment.

Fig. 11 is a plan view showing a notch of the embodiment.

Fig. 12 is a view showing wrinkles generated in the windshield of the comparative example.

Fig. 13 is a view showing wrinkles generated in the windshield of the comparative example.

Detailed Description

First, the structure of the windshield of the present embodiment will be described with reference to fig. 1 and 2. Fig. 1 is a plan view of a windshield, and fig. 2 is a sectional view of fig. 1. For convenience of explanation, the vertical direction of fig. 1 is referred to as "up and down", "vertical" and "longitudinal", and the horizontal direction of fig. 1 is referred to as "left and right". Fig. 1 illustrates a windshield viewed from the inside of a vehicle. That is, the inner side of the paper surface in fig. 1 is the vehicle outside, and the front side of the paper surface in fig. 1 is the vehicle inside.

As shown in fig. 1 and 2, the windshield includes a laminated glass 10 having a substantially rectangular shape, and is provided in an inclined state to a vehicle body. The laminated glass 10 has an outer glass plate 11 disposed on the vehicle outside, an inner glass plate 12 disposed on the vehicle inside, and an interlayer 13 disposed between these

glass plates

11, 12. A shielding layer 110 for shielding a view from the outside of the vehicle is provided on the peripheral edge portion of the laminated glass 10, and the imaging device 2 is disposed so as not to be visible from the outside of the vehicle by the shielding layer 110. However, the imaging device 2 is a video camera for capturing a situation outside the vehicle. Therefore, an imaging window (opening) 113 is provided at a position of the shielding layer 110 corresponding to the imaging device 2, and the imaging device 2 disposed in the vehicle can capture a situation outside the vehicle through the imaging window 113.

An image processing device 3 is connected to the image capturing device 2, and the image processing device 3 processes the captured image acquired by the image capturing device 2. The imaging device 2 and the image processing device 3 constitute an in-vehicle system 5, and the in-vehicle system 5 can provide various information to the occupant according to the processing of the image processing device 3. The respective components will be described below.

< 1 laminated glass >)

< 1-1. Glass plate >)

First, the outer glass plate 11 and the inner glass plate 12 will be described. The outer glass plate 11 and the inner glass plate 12 may be formed of a known glass plate, or may be formed of a heat-ray absorbing glass, a general transparent glass, a green glass, or a UV green glass. However, these

glass plates

11, 12 are required to achieve visible light transmittance meeting the safety standards of the country in which the automobile is used. For example, the required solar light absorptivity can be ensured by the outer glass plate 11, and the visible light transmittance can be adjusted to satisfy the safety standard by the inner glass plate 12. Hereinafter, examples of transparent glass, heat ray absorbing glass, and soda lime glass (soda lime glass) are shown.

(transparent glass)

SiO ₂ :70 to 73 mass percent

Al ₂ O ₃ :0.6 to 2.4 mass percent

CaO:7 to 12 mass percent

MgO:1.0 to 4.5 mass percent

R ₂ O:13 to 15 mass% (R is alkali metal)

Converted into Fe ₂ O ₃ Is (T-Fe) ₂ O ₃ ): 0.08 to 0.14 mass percent

(Heat ray absorbing glass)

The composition of the heat-ray absorbing glass can be set to, for example, the following composition: based on the composition of the transparent glass, the composition is converted into Fe ₂ O ₃ Is (T-Fe) ₂ O ₃ ) The ratio of (2) is set to 0.4 to 1.3 mass%, ceO is used ₂ The ratio of (2) is 0 to 2 mass% based on TiO ₂ The ratio of (2) is set to 0 to 0.5 mass percentThe skeleton component of the glass (mainly SiO ₂ 、Al ₂ O ₃ ) T-Fe reduction ₂ O ₃ 、CeO ₂ And TiO ₂ An increasing amount of (2).

(soda lime glass)

SiO ₂ :65 to 80 mass percent

Al ₂ O ₃ :0 to 5 mass percent

CaO:5 to 15 mass percent

MgO: more than 2 mass percent

NaO:10 to 18 mass percent

K ₂ O:0 to 5 mass percent

MgO+CaO:5 to 15 mass percent

Na ₂ O+K ₂ O:10 to 20 mass percent

SO ₃ :0.05 to 0.3 mass percent

B ₂ O ₃ :0 to 5 mass percent

Converted into Fe ₂ O ₃ Is (T-Fe) ₂ O ₃ ): 0.02 to 0.03 mass percent

The thickness of the laminated glass 10 of the present embodiment is not particularly limited, and the total thickness of the outer glass plate 11 and the inner glass plate 12 may be set to 2.1 to 6mm, and from the viewpoint of weight reduction, the total thickness of the outer glass plate 11 and the inner glass plate 12 is preferably set to 2.4 to 3.8mm, more preferably 2.6 to 3.4mm, and particularly preferably 2.7 to 3.2mm.

The outer glass plate 11 is required to have durability and impact resistance against external obstacles, and is required to have impact resistance against flying objects such as small stones as a windshield of an automobile. On the other hand, the larger the thickness, the more the weight increases, and thus is not preferable. From this viewpoint, the thickness of the outer glass plate 11 is preferably 1.8 to 2.3mm, and more preferably 1.9 to 2.1mm. Which thickness is used can be determined according to the application of the glass.

The thickness of the inner glass plate 12 may be the same as that of the outer glass plate 11, but for example, the thickness may be made smaller than that of the outer glass plate 11 in order to reduce the weight of the laminated glass 10. Specifically, the strength of the glass is preferably 0.6 to 2.0mm, more preferably 0.8 to 1.6mm, and particularly preferably 1.0 to 1.4mm. More preferably 0.8 to 1.3mm. The thickness of the inner glass plate 12 can be determined according to the purpose of the glass.

The laminated glass 10 is curved so as to protrude toward the vehicle outside as will be described later, and the thickness measurement site in this case is located at the upper and lower 2 portions of a central line (curve OP described later) extending in the up-down direction at the center in the left-right direction of the laminated glass 10. The measuring device is not particularly limited, and for example, a thickness gauge such as SM-112 manufactured by Teclock, inc. may be used. In the measurement, the end of the laminated glass 1 was held by the thickness gauge so that the curved surface of the laminated glass 10 was placed on the flat surface.

The outer glass plate 11 and the inner glass plate 12 are curved in the up-down direction and the horizontal direction so as to protrude toward the vehicle outside, and have different radii of curvature. The inner surface of the outer glass plate 11 and the outer surface of the inner glass plate 12 are in contact with each other via the intermediate film 13, and therefore, the surfaces can be regarded as having substantially the same radius of curvature. The radius of curvature of the portion in the up-down direction is, for example, 1200 to 16000mm, and the radius of curvature in the horizontal direction is, for example, 400 to 6000mm, and the radius of curvature in the horizontal direction is small. The method for measuring the radius of curvature is not particularly limited, and for example, the surface shape of each

glass plate

11, 12 may be three-dimensionally measured, calculated based on the three-dimensional measurement, or the surface shape of each

glass plate

11, 12 may be measured by a depth gauge, and the measured value may be converted into a value.

< 1-2. Intermediate film >

Fig. 3 is a partial cross-sectional view of a laminated glass. As shown in fig. 3, the intermediate film 13 includes a transparent 1 st adhesive layer 131 adhered to the outer glass plate 11, a transparent 2 nd adhesive layer 132 adhered to the inner glass plate 12, and a transparent functional layer 133 disposed between the two

adhesive layers

131, 132.

The 1 st adhesive layer 131 and the 2 nd adhesive layer 132 are not particularly limited as long as they are formed into a sheet shape and adhered to the

respective glass plates

11 and 12 by fusion, and may be formed of, for example, polyvinyl butyral resin (PVB), ethylene vinyl acetate resin (EVA), or the like. In general, the hardness of the polyvinyl acetal resin can be controlled by (a) the polymerization degree of polyvinyl alcohol as a starting material, (b) the acetalization degree, (c) the kind of plasticizer, and (d) the addition ratio of the plasticizer.

The 1 st adhesive layer 131 and the 2 nd adhesive layer 132 before being adhered to the

respective glass plates

11 and 12 may be embossed on the surfaces thereof for easy air extrusion when adhering to the functional layer 133 or when adhering to the

respective glass plates

11 and 12.

The thickness of the 1 st adhesive layer 131 and the 2 nd adhesive layer 132 is not particularly limited, and is, for example, preferably 0.001 to 2.0mm, and more preferably 0.1 to 1.0mm. However, the thicknesses of the two

adhesive layers

131 and 132 may be the same or different.

The total thickness of the

adhesive layers

131 and 132 is preferably 0.76mm or more. This is to ensure penetration resistance and the like specified in JISR3211 and R3212, for example, in windshields.

As the functional layer 133, films having various functions can be used according to purposes. For example, a heat insulating film, a heat generating film, a projection film for HUD, a light emitting film, a film for antenna, and the like can be used.

The heat insulating film is a film configured to reflect or absorb infrared rays in order to suppress an increase in temperature in the vehicle.

The heat generating film is used for removing mist or melting ice, and a plurality of thin wires or transparent conductive films which generate heat by applying a voltage can be supported by the base film.

The projection film projects information by using light irradiated from a head-up display device (HUD device). The projection film is not particularly limited as long as it has a refractive index different from that of the two

adhesive layers

131 and 132 and reflects light, and is preferably a film capable of controlling polarized light and having a higher reflectance of p-polarized light than glass, for example. The size of the projection film is not particularly limited, and is preferably larger than the area where information is projected.

The light emitting film incorporates an LED or the like, and emits light representing a predetermined character, figure, or the like.

The antenna film is a film in which an antenna such as FM, AM, DTV, DAB is disposed on a base film, similarly to the heat generating film.

The above is an example of the functional layer 133, and is not limited thereto.

The thickness of the film constituting the functional layer 133 is not particularly limited, but is preferably, for example, 0.01 to 2.0mm, more preferably 0.02 to 1.0mm, and even more preferably 0.03 to 0.6mm. Thus, the upper limit of the thickness of the end face of the peripheral edge of the film is preferably 2.0mm. This is because, when the thickness of the end face of the film is large, the functional layer 133 is smaller than the two

adhesive layers

131 and 132, and a step is generated in the intermediate film 13, and there is a possibility that air is contained and bubbles are generated when the intermediate film 13 is sandwiched between the two

glass plates

11 and 12 due to the step.

The heat shrinkage of the functional layer 133 is preferably small, for example, preferably 4% or less, more preferably 3% or less, and particularly preferably 2% or less when heated at 130 ℃ for 30 minutes. In particular, when a projection film is used as the functional layer 133, it is preferably 1% or less when heated at 130 ℃ for 30 minutes. The measurement of the heat shrinkage can be performed as follows. First, marks were marked on a film having a functional layer 133 at intervals of 500mm, the film was placed on a substrate without being fixed, the film was held in an electric furnace at 130 ℃ for 30 minutes, and the distance between the marks was measured, whereby the heat shrinkage was calculated. Among them, the heat shrinkage rate of the functional layer 133 may be different in the horizontal direction and the up-down direction, and for example, it is preferable that the heat shrinkage rate in the horizontal direction is smaller than the heat shrinkage rate in the up-down direction.

The thicknesses of the

adhesive layers

131 and 132 and the functional layer 133 can be measured as follows, for example. First, a cross section (for example, a cross section at the time of cutting) of a windshield is enlarged 175 times by a microscope (for example, VH-5500 manufactured by KEYENCE corporation) and displayed. The thickness of each of the

adhesive layers

131, 132 and the functional layer 133 was visually determined, and measured. In this case, in order to eliminate the visual deviation, the number of measurements was set to 5, and the average value was used as the thickness of each of the

adhesive layers

131 and 132 and the functional layer 133.

The size of each

adhesive layer

131, 132 is the same as that of the outer glass plate 11 and the inner glass plate 12, but the size of the functional layer 133 is smaller than that of both

adhesive layers

131, 132. Specifically, the peripheral edge of the functional layer 133 is located inside the peripheral edge of each

glass plate

11, 12. For example, the peripheral edge of the functional layer 133 is preferably disposed inside 10mm or more from the peripheral edge of each of the

glass plates

11, 12. As one of the purposes, as will be described later, if wrinkles are generated at the edge portion of the functional layer 133, moisture may intrude from the edge portion of the intermediate film 13, and therefore, this structure is adopted in order to prevent this. The position of the edge of the functional layer 133 can be adjusted so as to be hidden by the peripheral edge region 111 of the shielding layer 110 described later.

The

adhesive layers

131 and 132 and the functional layer 133 are prepared separately (3 sheets in total), and then laminated, for example, and can be disposed between the two

glass plates

11 and 12 as will be described later. For example, an adhesive layer may be applied to one surface of the functional layer 133. That is, as shown in fig. 4, 1 functional layer 133 and 1 st adhesive layer 131 coated with the adhesive layer 132 may be prepared in advance. Alternatively, the

adhesive layers

131 and 132 may be bonded to both surfaces of the functional layer 133 in advance, and a member formed by integrating 3 layers may be prepared. The adhesive layer 132 applied to the functional layer 133 can be thin, for example, 1 to 50 μm. In this case, the 1 st adhesive layer 131 having a large thickness can be disposed on the vehicle exterior side. In this way, for example, when a projection film is used as the functional layer 133, the distance from the vehicle-interior surface of the inner glass plate 12 to the projection film 133 becomes shorter, and thus the optical path becomes shorter, and the attenuation of light can be reduced. Alternatively, layers each having an adhesive layer applied to both surfaces of the functional layer 133 may be prepared. The 1 st adhesive layer 131 having a large thickness may be disposed on the vehicle interior side, and the 2 nd adhesive layer 132 may be disposed on the vehicle exterior side.

< 2 shielding layer >)

Next, the shielding layer 110 will be described. As illustrated in fig. 1 and 2, in the present embodiment, the shielding layer 110 is laminated on the vehicle-inside surfaces of the outer glass plate 11 and the inner glass plate 12. Specifically, as shown in fig. 1, the shielding layer 110 of the present embodiment can be divided into a peripheral edge region 111 along the peripheral edge portion of the laminated glass 10 and a protruding region (mounting region) 112 protruding downward in a rectangular shape from the upper edge portion of the laminated glass 10. The peripheral edge area 111 shields incidence of light from a peripheral edge portion of the windshield. On the other hand, the protruding region 112 prevents the imaging device 2 disposed in the vehicle from being seen from the outside of the vehicle. The shielding layer 110 laminated on the outer glass plate 11 and the shielding layer 110 laminated on the inner glass plate 12 may have substantially the same shape, but are not necessarily required to have the same shape.

However, if the shielding layer 110 shields the imaging range of the imaging device 2, the imaging device 2 cannot capture the condition of the front outside the vehicle. Therefore, in the present embodiment, a trapezoidal imaging window 113 is provided in the protruding region 112 of the shielding layer 110 at a position corresponding to the imaging device 2 so that the imaging device 2 can capture a situation outside the vehicle. That is, the imaging window 113 is provided independently of the non-shielding region 120 on the inner side in the surface direction of the shielding layer 110. The imaging window 113 is a region where the material of the shielding layer 110 is not laminated, and the laminated glass has the above-described transmittance of visible light, so that the condition outside the vehicle can be imaged. The size of the imaging window 113 is not particularly limited, and may be 7000mm, for example ² The above. In addition, in the case where the camera of the photographing apparatus 2 is a stereoscopic camera, or in the case where there are a plurality of cameras, a plurality of photographing windows 113 are provided.

As described above, the shielding layer 110 may be laminated only on the vehicle-interior surface of the inner glass plate 12 or only on the vehicle-interior surface of the outer glass plate 11.

Next, a material of the shielding layer 110 will be described. The material of the shielding layer 110 may be appropriately selected according to the embodiment as long as it can shield the view from the outside of the vehicle, and for example, ceramics having a dark color such as black, brown, gray, or dark blue may be used.

When black ceramics are selected as the material of the shielding layer 110, for example, black ceramics are laminated on the peripheral edge portion on the inner surface 130 of the inner glass plate 12 by screen printing or the like, and the laminated ceramics are heated together with the inner glass plate 12. Thereby, the shielding layer 110 can be formed at the peripheral edge of the inner glass plate 12. In addition, when printing black ceramics, a region where black ceramics is not printed locally is provided. Thereby, the imaging window 113 can be formed. In addition, various materials can be used for the ceramics used for the shielding layer 110. For example, ceramics having the composition shown in table 1 below can be used for the shielding layer 110.

TABLE 1

		Colored ceramic slurries of No. 1 and No. 2
			Pigment x 1	Mass percent of	10
Resin (cellulose resin)	Mass percent of	10
			Organic solvent (pine oil)	Mass percent of	10
Glass binder x 2	Mass percent of	70
			Viscosity of the mixture	dPs	150

*1, main components: copper oxide, chromium oxide, iron oxide and manganese oxide

*2, main components: bismuth borosilicate, zinc borosilicate

The shielding layer 110 may be formed of, for example, polyurethane or the like, in addition to the above-described ceramics. Alternatively, the shielding layer 110 may be formed of a resin film, or may be formed by adhering the resin film to the

glass plates

11 and 12.

< 3. Vehicle-mounted System >)

Next, an in-vehicle system 5 including an imaging device (information acquisition device) 2 and an image processing device 3 will be described with reference to fig. 5. Fig. 5 illustrates the structure of the in-vehicle system 5. As illustrated in fig. 5, the in-vehicle system 5 of the present embodiment includes the imaging device 2 and the image processing device 3 connected to the imaging device 2.

The image processing apparatus 3 is an apparatus that processes a captured image acquired by the imaging apparatus 2. The image processing apparatus 3 has, for example, general hardware such as a memory unit 31, a control unit 32, and an input/output unit 33 connected via a bus as a hardware configuration. However, the hardware configuration of the image processing apparatus 3 is not limited to such an example, and the specific hardware configuration of the image processing apparatus 3 may be appropriately added, omitted, or added with constituent elements according to the embodiment.

The storage unit 31 stores various data and programs (not shown) used in the processing performed by the control unit 32. The storage unit 31 may be realized by a hard disk, for example, or may be realized by a recording medium such as a USB memory. The various data and programs stored in the storage unit 31 may be acquired from a recording medium such as a CD (Compact Disc) or a DVD (Digital Versatile Disc: digital versatile Disc). Further, the storage unit 31 may be referred to as an auxiliary storage device.

As described above, the laminated glass 10 is arranged in an inclined posture with respect to the vertical direction and is bent. The imaging device 2 photographs the condition outside the vehicle via the laminated glass 10. Therefore, the photographed image acquired by the photographing device 2 is deformed due to the posture, shape, refractive index, optical defect, and the like of the laminated glass 10. In addition, aberration inherent to the camera lens of the photographing device 2 is also increased. Accordingly, the storage unit 31 may store correction data for correcting an image deformed by the aberration of the laminated glass 10 and the camera lens.

The control unit 32 includes 1 or more processors such as a microprocessor and a CPU (Central Processing Unit: central processing unit), and peripheral circuits (ROM (Read Only Memory), RAM (Random Access Memory: random access Memory), interface circuits, and the like) used for processing of the processors. The address space processed by the processor disposed in the control unit 32, such as ROM and RAM, may also be referred to as a main memory device. The control unit 32 functions as an image processing unit 321 by executing various data and programs stored in the storage unit 31.

The image processing unit 321 processes a captured image acquired by the imaging device 2. The process of capturing an image can be appropriately selected according to the embodiment. For example, the image processing unit 321 may analyze the captured image by pattern matching or the like, and recognize the subject captured in the captured image. In the present embodiment, the imaging device 2 captures a situation in front of the vehicle, and therefore the image processing unit 321 may determine whether or not a person is captured in front of the vehicle based on the subject recognition. In the case where a person is photographed in front of the vehicle, the image processing unit 321 may output a warning message by a predetermined method. For example, the image processing unit 321 may perform a predetermined processing on the captured image. The image processing unit 321 may output the processed captured image to a display device (not shown) such as a display connected to the image processing device 3.

The input/output unit 33 is 1 or more interfaces for transmitting and receiving data to and from a device external to the image processing device 3. The input/output unit 33 is an interface for connecting to a user interface, an interface such as USB (Universal Serial Bus: universal serial bus), or the like, for example. In the present embodiment, the image processing apparatus 3 is connected to the imaging apparatus 2 via the input/output unit 33, and acquires a captured image captured by the imaging apparatus 2.

The image processing apparatus 3 is not limited to a device designed exclusively for the provided service, and a device commonly used for a PC (Personal Computer: personal computer), a tablet terminal, or the like may be used.

The imaging device 2 is mounted on a bracket, not shown, which is mounted in the protruding region 112 of the shielding layer 110. Therefore, in this state, the mounting of the imaging device 2 to the bracket and the mounting of the bracket to the shielding layer 110 are adjusted so that the optical axis of the camera of the imaging device 2 passes through the imaging window 113. A cover, not shown, is attached to the bracket so as to cover the imaging device 2. Thus, the imaging device 2 is disposed in the space surrounded by the laminated glass 10, the bracket, and the cover, and only a part of the imaging device 2 is visible from the outside through the imaging window 113. The imaging device 2 is connected to the input/output unit 33 via a cable, not shown, which is led out from the cover and connected to the image processing device 3 disposed at a predetermined position in the vehicle. In addition, depending on the shape of the bracket, the bracket may be attached so as to straddle both the protruding region 112 and the peripheral region 111 adjacent thereto.

< 4. Notch or slit formed in intermediate film >)

A notch or a slit is formed at the end edge of the functional layer 133 of the intermediate film 13 of the present embodiment. This is to suppress the occurrence of wrinkles in the functional layer 133 when the laminated glass 10 is produced by sandwiching the interlayer 13 between the two

glass plates

11 and 12, as will be described later. In addition, as shown in fig. 4, in the case where the functional layer 133 is integrated with the 2 nd adhesive layer 132, a notch or slit is also formed in the 2 nd adhesive layer.

Fig. 6 shows an example of the notch. As described above, the edge of the functional layer 133 is arranged so as to be shielded by the shielding layer 110, but the notch 14 is also arranged so as to be shielded by the shielding layer 110. Specifically, the notch 14 is formed as follows. First, a pair of virtual lines X extending perpendicularly to the end edges of the laminated glass from both sides of the protruding region 112 in the connection portion between the protruding region 112 and the peripheral region 111 are defined. The region sandwiched between the pair of virtual lines in the peripheral region and the protruding region are defined as a notched region (region surrounded by thick lines in fig. 6). In the present embodiment, first, 2 notches 14 are formed above the imaging window 113 at a predetermined interval in the notch region. Further, notches 14 are also formed at the 4 corners of the functional layer 133, respectively. Each notch 14 is formed in a triangular shape having a sharp corner at the tip, but the shape of the notch 14 is not particularly limited.

For example, the notch 14 shown in fig. 7A is triangular in shape with a width narrowing toward the tip, but the tip is formed in an arc shape. The notch 14 shown in fig. 7B is formed in a trapezoidal shape whose width becomes narrower toward the front end. The notch 14 shown in fig. 7C is formed in an arc shape. Further, the notch 14 shown in fig. 7D is formed in a polygonal shape. These are examples of the notch 14, and may be of various shapes as long as they have a predetermined area.

In addition, in addition to the notch 14 having an area, as shown in fig. 8, a slit 15 may be formed. The slit 15 is formed of a linear shape, as shown in fig. 8, but may be formed of a curved shape, or a plurality of straight lines or curved lines may be combined.

The number and positions of the notches 14 and slits 15 are not particularly limited, and can be appropriately set. For example, in the example of fig. 6, 6 notches 14 are formed, but this is an example, and 1 or more notches may be formed at the end edge of the functional layer 133. However, it is preferable to form the notch 14 or the slit 15 at least in the notch region. Alternatively, in addition to the example of fig. 6, the functional layer 133 may be formed at any position of the upper side, the lower side, the right side, and the left side other than the corner. Further, the notch 14 and the slit 15 may be mixed. Further, the notch formed outside the notch region on the upper side of the functional layer 133 corresponds to the 2 nd notch of the present invention.

In the case of using the functional layer 133 coated with the adhesive layer 132 as shown in fig. 4, the notch 14 or the slit 15 can be formed between the functional layer 133 and the adhesive layer 132. In this case, the 1 st adhesive layer 131 is not formed with the notch 14 or the slit 15.

< 5 method for manufacturing windshield >

Next, an example of a method for manufacturing a windshield configured as described above will be described.

First, a method for producing the laminated glass 1 will be described.

First, the shielding layer 110 is laminated on at least one of the outer glass plate 11 and the inner glass plate 12 in the form of a flat plate. These

glass plates

11, 12 are then shaped in a curved manner. The molding method is not particularly limited, and a known method can be used. For example, after a flat glass plate passes through a heating furnace, the flat glass plate can be formed into a curved shape by pressing with an upper die and a lower die. Alternatively, a flat outer glass plate and an inner glass plate are overlapped and placed on a frame-type molding die, and passed through a heating furnace. Thus, both glass plates soften and are formed into a curved shape by their own weight.

When the outer glass plate 11 and the inner glass plate 12 are formed in a curved shape in this way, the intermediate film 13 is then sandwiched between the outer glass plate 11 and the inner glass plate 12, and the sheets are placed in a rubber bag and pre-bonded at about 70 to 110 ℃ while being sucked under reduced pressure. As described above, the intermediate film 13 is a film in which the

adhesive layers

131 and 132 and the functional layer 133 are laminated. The method of pre-bonding may be other than this. For example, the interlayer 13 is sandwiched between the outer glass plate 11 and the inner glass plate 12, and heated at 45 to 65 ℃ by an oven. Then, the laminated glass is pressed by a roller at 0.45 to 0.55 MPa. Then, the laminated glass is heated again by an oven at 80 to 105 ℃ and then pressed again by a roller at 0.45 to 0.55 MPa. This completes the pre-bonding.

Next, the final bonding is performed. The pre-bonded laminated glass is subjected to primary bonding at 100 to 150 ℃ using an autoclave, for example, at 8 to 15 atmospheres. Specifically, the main bonding can be performed under conditions of 14 atmospheres and 140 ℃. The laminated glass 10 of the present embodiment was produced in this manner. In the case of using the functional layer 133 coated with the adhesive layer 132, the notch 14 or the slit 15 is formed in the adhesive layer 132, but the notch 14 formed in the adhesive layer 132 is buried in the 1 st adhesive layer 131 because the both

adhesive layers

131 and 132 are melted by heating. Therefore, the two

glass plates

11, 12 are fixed by the

adhesive layers

131, 132.

< 6. Characteristics >

According to the windshield described above, the notch 14 or the slit 15 is formed in the planar functional layer 133 disposed between the two

curved glass plates

11 and 12 so as to be located in the notch region. The inventors confirmed that the masking layer 110 was removed, and as a result, wrinkles extending from the notch 14 or the slit 15 were seen. It was confirmed that the wrinkles extend in substantially the same direction as the notches 14 and slits 15. Therefore, even if wrinkles are generated, wrinkles are generated in the notched areas of the shielding layer 110, and thus the wrinkles can be made invisible from the outside. That is, by forming the notch 14 or the slit 15 in which the wrinkles are generated in the notch area, the wrinkles can be hidden in the notch area together with the notch 14 or the slit 15. Therefore, the external appearance of the windshield can be prevented from deteriorating.

If the notch 14 or slit 15 is located in the peripheral edge region 111, the notch may be slightly protruded from the notch region. However, if the wrinkles are not exposed from the notch area as much as possible, the notches 14 and slits 15 are preferably separated from the virtual line X by 10mm or more, and more preferably separated from the virtual line X by 20mm or more (for example, refer to fig. 11). The distance from the tip of the notch 14 or slit 15 to the vertical direction of the imaging window 113 is, for example, preferably 20mm or more, more preferably 30mm or more, and particularly preferably 40mm or more.

Further, as has been found by the inventors, as described above, the formation of the notch 14 or the slit 15 in the functional layer 133 at the corner or the like other than the notch region can suppress the occurrence of wrinkles.

The inventors also confirmed that wrinkles were not generated due to the notch 14 or the slit 15. That is, when the planar functional layer 133 is disposed between the two

glass plates

11 and 12 that are bent, the deformation of the edge portion of the functional layer 133 is absorbed by the notch 14 or the slit 15, and therefore, wrinkles may not occur.

< 7. Modification >

While the above description has been given of one embodiment of the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist thereof. The following modifications can be appropriately combined.

＜7-1＞

The shape of the shielding layer 110 is not particularly limited, and in the above example, the shielding layer has the peripheral edge region 111 and the protruding region 112, but for example, the shape and position of the protruding region 112, the shape and number of the imaging windows 113 may be appropriately changed, and the width of the peripheral edge region 111 may be not constant or may be changed. In this case, even if wrinkles occur in the functional layer 133, the wrinkles may be hidden in the shielding layer 110 of either one of the

glass plates

11 and 12.

＜7-2＞

In the above embodiment, the functional layer 133 is sandwiched between 2

adhesive layers

131 and 132, but for example, an intermediate layer 13 may be provided in which 1 adhesive layer and 1 functional layer 133 are laminated. In this case, the functional layer 133 needs to contain a material that can be bonded to the

glass plates

11 and 12, and for example, PVB, PVA, EVA and the like can be contained.

＜7-3＞

The shape of the notch can be as shown in fig. 9. In the example of fig. 9, the notch 14 is formed in a rectangular shape extending downward from the end edge of the functional layer 133, and the notch 14 includes a photographing window (information acquisition region) 113 formed in the shielding layer 110. This can further suppress the generation of wrinkles in the functional layer 133 in the imaging window 113. The shape of the notch may be other than a rectangular shape, and is not particularly limited as long as the notch includes a photographing window.

＜7-4＞

In the above embodiment, the laminated glass for an automobile of the present invention is applied to a windshield, but it can be applied to a rear glass, a side glass, and the like. In this case, the shielding layer 110 may not be provided.

Examples

Hereinafter, examples of the present invention will be described. However, the present invention is not limited to the following embodiments.

The windshield shown in fig. 10 was prepared as an example by using the manufacturing method shown in the above embodiment. In this embodiment, 2 notches 14 are formed above the photographing window 113 on the upper side of the functional layer 133. The dimensions of a particular notch 14 are shown in fig. 11. The functional layer 133 was formed such that the peripheral edge of the functional layer 133 was located 10mm inward of the peripheral edges of the

glass plates

11 and 12. On the other hand, as a comparative example, an example was prepared in which no notch was formed in the above-described example.

The glass plate and the interlayer are as follows.

Outer glass pane: float glass with thickness of 2.3mm

Inner glass plate: float glass with thickness of 2.0mm

1 st adhesive layer: PVB with a thickness of 800. Mu.m

Functional layer with adhesive layer: PVB having a thickness of 30 μm was applied to a projection film having a thickness of 60 μm (heat shrinkage in the up-down direction: 3% and heat shrinkage in the horizontal direction: 2%).

The notch is formed in the functional layer with the adhesive layer.

As a result of observation of the windshields of the examples and comparative examples manufactured in this way, wrinkles were confirmed in the areas surrounded by white circles in the comparative examples as shown in fig. 12 and 13. That is, as shown in fig. 12, a plurality of wrinkles are observed along the upper edge of the windshield. In addition, as shown in fig. 13, 3 wrinkles were observed on the right side of the windshield. Although not shown, wrinkles extending from the peripheral edge region 111 into the protruding region 112 were also confirmed. On the other hand, in the windshield of the example, although not shown, wrinkles (about 15 mm) extending downward from the tip end of the notch 14 were confirmed. However, the wrinkles do not reach the imaging window 113, and are blocked by the shielding layer 110 together with the notch 14, so that the wrinkles cannot be visually recognized from the outside.

Description of the reference numerals

10. Laminated glass

11. Outer glass plate

12. Inner glass plate

13. Intermediate film

131 st adhesive layer 1

132 No. 2 adhesive layer

133. Functional layer

110. And a shielding layer.

Claims

1. A laminated glass to which an information acquisition device that can acquire information outside a vehicle by using light is attached via a bracket, the laminated glass characterized by comprising:

an outer glass plate;

an inner glass plate disposed opposite to the outer glass plate;

the shielding layer includes:

when a pair of virtual lines extending perpendicularly from both ends of a connecting portion of the mounting region to the peripheral region with respect to an end edge of the laminated glass are defined, at least 1 of a notch and a slit is formed at an end edge of the functional layer at a position corresponding to either one of a region sandwiched by the pair of virtual lines in the peripheral region and the mounting region.

2. The laminated glass of claim 1, wherein:

at least 1 notch is formed in the functional layer.

3. The laminated glass of claim 2, wherein:

the front end of the notch is formed by an acute angle corner.

4. The laminated glass of any of claims 1-3, wherein:

the outer glass sheet and the inner glass sheet are formed into a substantially rectangular shape having long sides and short sides,

the notch or slit is formed in the long side.

5. The laminated glass of any one of claims 1 to 4, wherein:

the outer glass plate and the inner glass plate have different radii of curvature in the horizontal direction and in the up-down direction,

6. The laminated glass of any one of claims 1 to 5, wherein:

an information acquisition area for receiving the light is provided in the mounting area,

the notch or slit is not formed in the information acquisition region.

7. The laminated glass of any one of claims 1 to 5, wherein:

8. The laminated glass of any one of claims 1 to 7, wherein:

in the functional layer, at least 12 nd notch having an acute front end is formed at a position different from the notch or slit at an end edge where the notch or slit is formed.

9. The laminated glass of any one of claims 1 to 8, wherein:

a plurality of said notches or slits are formed.

10. The laminated glass of any one of claims 1 to 9, wherein:

the notch or slit is also formed at a position corresponding to the peripheral region of the shielding layer.

11. The laminated glass of any one of claims 1 to 10, wherein:

the thickness of the functional layer is below 2.0mm.

12. The laminated glass of any one of claims 1 to 11, wherein:

the functional layer is formed of a projection film for HUD.

13. The laminated glass of any one of claims 1 to 12, wherein:

the interlayer film includes the functional layer and a pair of the adhesive layers sandwiching the functional layer.